Systems for electrochemical sorting of metals and alloys

Patent metadata

Field	Value
Publication number	US-9702845-B2
Application number	US-201514626092-A
Country	US
Kind code	B2
Filing date	Feb 19, 2015
Priority date	Feb 19, 2015
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Disclosed is an electrochemical probe system and an electrical excitation method, configured in a bulk sorting system, and used to identify the composition of metals and alloys.

First claim

What is claimed is:

1. A bulk electrochemical metal and/or alloy test system, comprising:
a separator station configured to separate bulk provided pieces of metal and/or alloy;
a conveyor system configured to move the individual pieces of metal and/or alloy in a particular direction;

a moving system configured to move the individual pieces of metal and/or alloy from the conveyor system;
a holding station configured to receive and hold the individual pieces of metal and/or alloy received from the moving system;
an electrochemical probe system configured to perform tests on the individual pieces of metal and/or alloy at the holding station to identity characteristics of the individual pieces of metal and/or alloy; and
a second moving system configured to remove the tested individual pieces of metal and/or alloy from the holding station to a location based on the results of the tests.

2. The test system of claim 1 wherein the electrochemical probe system further includes an electrically conductive test probe, an electrolyte and an electrically non-conductive membrane which carries the electrolyte, wherein the membrane is provided between the test electrode probe and one of the individual pieces of metal and/or alloy via a membrane electrolyte carrier.

3. The test system according to claim 2 wherein the membrane electrolyte earner selectively moves the membrane to ensure a clean portion of the membrane interacts with the test probe electrode.

4. The test system according to claim 3 wherein the membrane is comprised of both absorptive sections and non-absorptive sections, in a relationship wherein electrolyte carried in one absorptive section of the membrane is kept from wicking into another absorptive section of the membrane.

5. The test system of claim 1 wherein the electrochemical probe system further includes an electrically conductive test probe, an electrolyte, a non-conductive membrane which carries the electrolyte, and an electrolyte carrying tube, wherein the test probe is located within the electrolyte carrying tube, and the membrane covers at least a portion of a bottom section of the electrolyte carrying tube.

6. The test system of claim 1 wherein the separator station is configured as at least one of a shaker table and a separator pick and place system.

7. The test system of claim 1 further including a metal and/or alloy straightening station configured as at least one of a roller arrangement and a metal press arrangement.

8. The test system of claim 1 wherein the holding station further includes a plurality of pneumatically driven pointed metal probes positioned to act together to fix one specific metal and/or alloy in a fixed position.

9. The test system of claim 1 wherein the holding station further includes a cleaning station to clean the individual pieces of metal and/or alloy.

10. The test system of claim 1 wherein the electrochemical probe system further includes an electrically conductive test probe cartridge including an electrolyte, a tube having an interior in which is carried the electrolyte, an electrically conductive test probe, and a non-conductive membrane, the tube having first and second openings, the first opening sized to allow passage of the test probe into the inferior of the tube, the second opening of the tube sized to permit insertion of at least a portion of the membrane providing a selective fluidic path for the electrolyte through the membrane.

11. The test system of claim 10 wherein the test probe cartridge further included a valve arrangement, to allow measured amounts of the electrolyte to move from the interior of the tube into and through the membrane.

12. The test system of claim 10 further including a plurality of test probe cartridges and a common electrode incorporated in a single body structure.

13. The test system of claim 12 , wherein the plurality of test probe cartridges and the common electrode incorporated in the single body structure are spring loaded for movement to operably engage with the metal and/or alloy being tested.

14. The test system of claim 12 wherein the single body structure includes a flat bottom face with openings to allow passage of the test probe cartridges and the system electrode, and sealing gaskets to allow a sealing contact to a surface of the metal and/or alloy.

15. The test system of claim 10 wherein the test cartridge includes onboard communication components to communicate informational data related to the test cartridge.

16. The test system of claim 15 further including computing and communication components to receive the informational data from the cartridge, and to provide the informational data to a user.

17. The test system of claim 15 further including computing and communication components to input informational data to the cartridge and to receive informational data from the cartridge.

18. The test system of claim 10 further including an off-board reservoir of electrolyte for feeding the electrolyte into the first opening of the tube.

19. The test system of claim 1 wherein the electrochemical probe system further includes an electrical signal generating device in electrical connection with a system electrode and an electrically conductive test probe electrode, configured to generate asymmetric excitations.

20. A method of performing electrochemical testing of bulk metal and/or alloy, comprising:
separating, by a separator station, individual pieces of metal and/or alloy provided in bulk;
conveying, by a conveyor system, the individual pieces of metal and/or alloy in a particular direction;
moving, by a moving system, the individual pieces of metal and/or alloy from the conveyor system;
holding, by a holding station, the individual pieces of metal and/or alloy received from the moving system;
testing, by an electrochemical probe system, the individual pieces of metal and/or alloy at the holding station to identify characteristics of the individual pieces of metal and/or alloy; and
performing a second moving, by a second moving system, to remove the tested individual pieces of metal and/or alloy from the holding station to a location based on the results of the tests.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Eldershaw Craig
• Sahu Saroj
• Garner Sean
• Rao Ranjeet
• Kole Ashutosh
• Vedharathinam Vedasri
• Desai Divyaraj
• Rivest Jessica Louis Baker
• Steele Richard
• Sheridan Martin J

Classifications

• G01N27/403

  Cells and electrode assemblies · CPC title

• B07C2501/0054

  Sorting of waste or refuse · CPC title

• B07C2501/0036

  Sorting out metallic particles · CPC title

• G01N27/31

  Half-cells with permeable membranes, e.g. semi-porous or perm-selective membranes · CPC title

• G01N27/416

  Systems (G01N27/27 takes precedence) · CPC title